CODEWITHSUNDEEP
.net-coretrace
Robotronx
Robotronx

Reputation: 1818

Set TraceId on Activity

I have a worker service which listens on a message broker and gets triggered when a message arrives. Once it is triggered I manually create an Activity and copy SpanId from the incoming message into the local Activity.ParentID. However, the local Trace Id is generated anew and I lose the ability to trace across services. I cannot manually copy the Trace Id over because Activity.TraceId is read only.

Activity.DefaultIdFormat = ActivityIdFormat.W3C;
using var activity = new Activity("Consumer");
activity.SetParentId(messageFromBroker.ParentId);
activity.Start();
_logger.LogInformation("foo foo foo");
// ... do some processing...
activity.Stop();

How can I create a new Activity and manually set TraceId?

Upvotes: 5

Views: 3649

Answers (2)

Arshia
Arshia

Reputation: 1

It seems it is done automatically by MassTransit:

builder.Services.AddOpenTelemetry()
    .ConfigureResource(ConfigureResource)
    .WithTracing(b => b
        .AddSource(DiagnosticHeaders.DefaultListenerName) // MassTransit ActivitySource
        .AddConsoleExporter() // Any OTEL suportable exporter can be used here
    );

https://masstransit.io/documentation/configuration/observability#tracing

Upvotes: 0

Robotronx
Robotronx

Reputation: 1818

It seems TraceId cannot be set explicitly, but what you can do is provide entire traceparent header, as below:

activity.SetParentId("00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01");

Upvotes: 3

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